This is why Farming well is more important than not feeding.

http://i.imgur.com/aWZ9B65.png

I started this game 0/6/0 because the Darius rushed Swifties first item and then bush camped and fake roamed the entire laning phase so he could get free kills on me. And it worked, he got 5 solo kills on me. Just 1 problem: He didn't actually stop me from farming. I still had 170 CS at 20 minutes. I still got Triforce and Essence Reaver in 21 minutes. I still got my IE by 27 minutes. And I was still way, way stronger than he was because I still got my items by farming well and outscaling. I could have avoided dying so much, but I would have needed to deny myself extremely hard to do so, easily having only half the CS I ended with. And that wouldn't have been worth it. Making sure you're strong enough to contribute is far more important than making sure you don't feed. And conversely, denying an enemy is more important than getting fed yourself; A 0/0/0 Vayne with 130 CS at 30 minutes isn't going to do anything no matter the circumstances. A Vayne with 280 CS at 30 minutes and a 0/7 score is going to be way, way more useful than the first Vayne. Losing lane and feeding is bad. Not farming is far worse.